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C. HIRSGH.

OIL PUMP. No. 354,419. Patented nge. 14, 1886.

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UNITED STATES ljAfinNTY OFFICE.

CHARLES HlRS-OH, OF BUFFALO, NEWY YORK.

SPECIFICATION forming part of Letters Patent No. 354,419, dated December 14, 1886.

Application filed August Q5, 18'86.

To all whom -it may concern:

Be it known that I, CHARLEs HrnsoH, of the city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Oil-Pumps, of which the following is a specification.

This invention relates more particularly to that class of oil-pumps which are employed in connection with steam engines for injecting the lubricant into the space to be lubricated against the pressure of the steam contained in such space.

The object of my invention is the construction of a simple and efficient pump of this kind; and my invention consists of the improvements inthe construction of the pump7 as will be hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical longitudinal section of my improved oil-pump. Fig. 2 is a horizontal section in line a: x, Fig. l.

Like letters of reference refer to like parts in both figures.

A represents the oil-reservoir, provided with the usual cover, ct, and B is the horizontal pump-cyli nder arranged centrally in the reservoir A and extending through one side ofthe reservoir.

C Ais the stuffing-box formed at the outer end or" the pump-cylinder, and D is the piston-rod, which is guided in the stuffingbox O.

E represents the piston formed at or attached to the inner end of the piston-rod D and working in the cylinder B, and F is aknob or handle secured to the outer end of the piston-rod D.

g represents a chamber formed on the under side of the pump-cylinder B and communicating therewith by a passage, g. The chamber g is arranged in line with the center of the oilreservoir, and is formed with an opening, g2, in its bottom. The oil-reservoir A is provided in its bottom with an opening, a', which is arranged directly below the opening g2 in the chamber g. .i

H represents a plug or stem which is inserted through the opening a in the bottom of the oilreservoir and secured tothe under side of the chamber g by a screw-thread, 72, formed onthe inner end of the stem and engaging with an in Serial No, 211,821.

The stem .H is provided with a cap, h', which closes the opening a in the bottom of the reservoir A. A suitable packing is preferably interposed between the cap h and the bottom of the reservoirto form a tight joint.

'i represents au oil-passage formedin the stem H and opening into the chamber g; The oilpassage t' communicates with the oil-reservoir A through openings i, formed in the stem H near the bottom of the reservoir A;

j represents a ballvalve arranged in the chamber g and resting upon a seat, j', formed in the top of the stem H around the passage t' and closing the communication between the passage t and the chamber g.

K represents a horizontal shank formed in the outer side of the oil-reservoir and arranged in line with the pump-cylinder B, and provided with ascrewthread, k, whereby the pump is attached to the steam-cylinder or other part to be lubricated. The shank K is east hollow, forming. a chamber, k, which communicates with the pumpcylinder through an opening, 7c.

Zrepresents a ballvalve arranged in the chamber It" and resting against a seat, l', formed around the opening k2, whereby the communication between the pump cylinder and the chamber k is closed. The chamber la opens into the steam-cylinder or other space to be lubricated, and the pressure of the steam therein retains the valve Z against the seat and closes the opening k2.

Vhen the piston E has been moved forward against the opening k2, the passage g'is closed by the piston, and no oil can escape from the chamber g into the pumpcylinder. Vhen the piston has been retracted to the outer end of the cylinder7 this movement of the piston causes the valve j to rise from its seat, and permits the oil to escape from `the reservoir A through the passages z' and g into the pumpcylinder. Upon the return or forward movement of the piston, the valve j drops back to its seat, closing the passage t', and the valve Z is forced away from its seat by the forward movement of the piston. The oil which has (Xo molel.)

' entered the cylinder' is thereby prevented from ternal screwthread formed in the opening g2.

iiowing back into the reservoir, but is expelled through the opening k2 into the chamber k', where it finds its escape to the steam-space to be lubricated. The valve Z is prevented from IOO dropping out of the Chamber 7c,when the pump is removed from the steam-eylinde1,bya pin,m.

The reservoir A, pump-Cylinder B, chamber g, and shank K are all cast in one piece, and the stem H can be readily inserted in place through the opening in the bottom ofthe reservoir, whereby the construction of the pump is greatly simplied and the pump rendered more compact and convenient for use.

I claim as my invention 1. The oombina`tion,with the oil-reservoir A and pump-cylinder B, of the chamber g, arranged below the pump-cylinder and commit nioating therewith by a passage, g', a stein, H, arranged below the chamber g and provided with the oil-passages t' i', forming a Communication between the Chamber g and the bottom of the oil-reservoir, and a valve, j, arranged in the chamber g, substantially as set forth.

' CHARLES HIRsoH.

Vitnesses:

JN0. J. BoNNER, CARL F. GEYER. 

